JP4638567B2 - Skin cosmetics - Google Patents
Skin cosmetics Download PDFInfo
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- JP4638567B2 JP4638567B2 JP31645099A JP31645099A JP4638567B2 JP 4638567 B2 JP4638567 B2 JP 4638567B2 JP 31645099 A JP31645099 A JP 31645099A JP 31645099 A JP31645099 A JP 31645099A JP 4638567 B2 JP4638567 B2 JP 4638567B2
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Description
【0001】
【発明の属する技術分野】
本発明は、紫外線による皮膚の炎症を抑制する効果と、色黒の皮膚を速やかに淡色化する効果とを有する皮膚化粧料に関する。
【0002】
【従来の技術】
皮膚に紫外線が曝露されると、それにより皮膚が種々の影響を受ける。その際皮膚内で発生する活性酸素、過酸化脂質等は、炎症を引き起こし、皮膚組織に大きなダメージを与える。これらのダメージは、皮膚の潤いやつや、きめ等を失わせ、更にその影響が真皮に及び、シワ等が形成され光加齢の要因となる。また、皮膚の色調が変化し黒化する原因の一つとして、紫外線により発生する活性酸素や周囲の細胞から放出される種々の因子により、メラノサイトが活性化されチロシナーゼ活性が高まりメラニンが過剰に作られ表皮細胞に受け渡されると考えられている。そして、メラニンはチロシンが酸化されることにより産生され、結果、皮膚の色調は変化し黒化するとされている。
【0003】
したがって、美白効果を示すためには、メラニン生成を抑制するとともに、紫外線暴露により生じる活性酸素や過酸化脂質等による炎症反応を抑制することが重要であり、また、炎症を抑制することは皮膚の状態を正常に保ち、光加齢防止等重要な役割を果たすと考えられる。
【0004】
従来、皮膚の黒化やしみ、そばかすを防ぎ、本来の白い肌を保つために、コウジ酸、アルブチン、ハイドロキノンモノベンジルエーテル、過酸化水素等を配合した美白化粧料が提案されている。また、紫外線による炎症を抑制するために、ビタミンC等が提案されている。
【0005】
【発明が解決しようとする課題】
アルブチン、コウジ酸、ハイドロキノンモノベンジルエーテル等を配合すると、若干色黒の肌を淡色化する効果はあるが、望むレベルには達していない。また、紫外線による炎症抑制効果はなく、皮膚の安全性上に問題がある場合がある。ビタミンC等では美白効果及び抗炎症効果を有するが、効果の程度及び安定性の面で改善すべき余地があった。この様に、炎症抑制効果、美白効果に優れ、且つ皮膚安全性が高く、十分な保存安定性を有する皮膚化粧料を得ることは困難を極めている。
【0006】
係る状況下、本発明の目的とするところは、炎症抑制効果、美白効果に優れ、製剤中での安定性、皮膚安全性が高く、使用感の優れた皮膚化粧料を提供するにある。
【0007】
【課題を解決するための手段】
本発明者等は、このような状況に鑑み、従来技術の難点を改良せんとして鋭意研究を重ねた結果、本発明で利用される特定の化合物が、格段に優れた炎症抑制効果と美白効果を有することを見いだし、安定性、皮膚安全性が高く、使用感の優れた皮膚化粧料を提供できるに至った。
【0008】
上記の目的を達成するために、本発明の皮膚化粧料は、次のような構成を採る。即ち、本発明は下記構造式(1)で示されるキサントトキソール(8−ヒドロキシプソラレン)を含有することを特徴とする皮膚化粧料にある。
【0009】
【化1】
【0010】
【発明の実施の形態】
以下、本発明の実施形態について詳述する。
【0011】
キサントトキソールは、常法に従い、キサントトキシンやインペラトリンの酸分解によって得ることができる。また、アンゲリカ種子等の天然物から直接抽出しても得ることができる。
【0012】
キサントトキソールの皮膚化粧料中への配合量は、化粧料総量を基準として、好ましくは、0.01〜5.0質量%(以下wt%とする)であり、更に好ましくは0.05〜3.0wt%である。
【0013】
配合量が0.01wt%未満では本発明の目的とする効果が十分に得られない場合があり、配合量が5.0wt%を超えても、その増加分に見合った効果の向上は望めない場合があり、使用時の感触が悪くなり易く、個々の剤型を保持し難くなる場合がある。
【0014】
本発明の皮膚化粧料は、一般に皮膚に塗布する形の化粧料の他、入浴剤として用いてもよい。剤型としては、一般に用いられる、水溶液、W/O型又はO/W型エマルション、適当な賦形剤等を用いて顆粒剤その他の粉末、錠剤等とすることが考えられ、具体的にはクリーム、乳液、化粧水、パック、ジェル、スティック、シート、パップ等が挙げられる。この皮膚化粧料は、例えば、乳液等の場合、油相及び水相をそれぞれ加熱溶解し、乳化分散して冷却する通常の方法により製造することができる。
【0015】
尚、本発明の皮膚化粧料には、上記の他、タール系色素、酸化鉄等の着色顔料、パラベン等の防腐剤、脂肪酸セッケン、セチル硫酸ナトリウム等の陰イオン性界面活性剤、ポリオキシエチレンアルキルエーテル、ポリオキシエチレン脂肪酸エステル、ポリオキシエチレン多価アルコール脂肪酸エステル、ポリオキシエチレン硬化ヒマシ油、多価アルコール脂肪酸エステル、ポリグリセリン脂肪酸エステル等の非イオン性界面活性剤、テトラアルキルアンモニウム塩等の陽イオン性界面活性剤、ベタイン型、スルホベタイン型、スルホアミノ酸型、N−ステアロイル−L−グルタミン酸ナトリウム等の両イオン性界面活性剤、レシチン、リゾフォスファチジルコリン等の天然系界面活性剤、ゼラチン、カゼイン、デンプン、アラビアガム、カラヤガム、グアガム、ローカストビーンガム、ドラガカントガム、クインスシード、ペクチン、カラギーナン、アルギン酸ソーダ等の天然高分子、メチルセルロース、ヒドロキシエチルセルロース、ヒドロキシプロピルセルロース、カルボキシメチルセルロースナトリウム、エチルセルロース等の半合成高分子、ポリビニルアルコール、ポリビニルメチルエーテル及びコーポリマー、ポリビニルピロリドン、ポリアクリル酸ソーダ、カルボキシビニルポリマー、ポリエチレンオキシドポリマー等の合成高分子、キサンテンガム等の増粘剤、酸化チタン等の顔料、ジブチルヒドロキシトルエン等の抗酸化剤等を、本発明の目的を損なわない範囲内で適宜配合することができる。
【0016】
【実施例】
以下、実施例、製造例及び比較例に基づいて本発明を詳細に説明する。尚、本発明はこれらに限定されるものではない。
【0017】
本発明で用いるキサントトキソールは、キサントトキシンを塩化アルミニウム−塩酸系中で加熱処理した後にヘキサン−酢酸エチル(1:1)混合溶媒からの再結晶により淡黄色綿状結晶として得た。得られたキサントトキソールの構造はGC−MS及びNMR(図1)にて確認した。
【0018】
得られたキサントトキソールを用いて下記のメラニン生成抑制試験を行った。
【0019】
(1)メラニン生成抑制試験
B16メラノーマ細胞を3×104個/wellで24穴プレートに播き、24時間後、各試料化合物を含有したTheophylline入り培地に交換した。
72時間培養を行い細胞数を求めた後、続いて細胞を10%TCA,エタノール/ジエチルエーテル(=1/1)で処理した。続いて、10%ジメチルスルホキシドを含有する1mol/L水酸化ナトリウム水溶液に溶解後のOD475値を求めてメラニン量とし、細胞あたりのメラニン生成の抑制率(%)を求めた。表1に試験結果を示した。
【0020】
【0021】
後記の実施例及び比較例の皮膚化粧料に関して実施した各種試験;(2)紫外線紅斑抑制試験(3)美白実用試験(4)連用官能試験の試験法は次の通りである。
【0022】
(2)紫外線紅斑抑制試験
除毛したハートレー系モルモット10匹の背部皮膚にUVB領域紫外線の最小紅斑量の2倍を各2ヶ所ずつ照射を行った。試料塗布部位とベース(試料を除いたもの)塗布部位を設定して、24時間前と照射直後に試料又はベースを塗布し、24時間後に紅斑の状態を表2に示した判定基準に従い判定し、平均点により評価を行った。
【0023】
【0024】
(3)美白実用試験
夏期の太陽光に3時間(1日1.5時間で2日間)曝された被試験者20名の前腕屈側部皮膚を対象として、左前腕屈側部皮膚には太陽光に曝された日より試料を、右前腕屈側部皮膚には太陽光に曝された日よりベースを朝夕1回ずつ13週連続塗布した。尚、評価はベース塗布部より試料塗布部において美白効果を確認された被験者の人数で示した。
【0025】
(4)連用官能試験
20名の女性被試験者を対象として朝夕1回ずつ13週連続塗布した際、試料の特性を評価して、「肌に潤いが生じた」、「皮膚が明るくなった」と回答した人数で示した。
【0026】
実施例3〜4、比較例3(スキンローション)
表3の原料組成において、表4に記載の有効成分を配合して、スキンローションを調製し、前記の諸試験を実施した。
【0027】
・調製法
表4に記載のB成分をC成分中に、均一に溶解した後、A成分とC成分を均一に混合攪拌、分散し次いで容器に充填した。
【0028】
【0029】
【0030】
・特性
諸試験を実施した結果を表4に記載した。表4に示す如く、比較例3は諸試験において良好な結果は示さなかった。実施例3及び4の本発明の皮膚化粧料は諸試験の総てにおいて明らかに良好な結果を示し、ヒト皮膚での諸試験において皮膚刺激は生じなかった。
【0031】
実施例5〜6、比較例4(スキンクリーム)
表5の原料組成において、表6に記載の如く有効成分を配合して、スキンクリームを調製し、前記の諸試験を実施した。
【0032】
・調製法
表5に記載のA成分と、B成分をC成分に混合したものとを、それぞれ均一に加熱溶解して温度を80℃にする。次いで、A成分中にC成分を注入乳化した後、攪拌しながら30℃まで冷却した。
【0033】
【0034】
【0035】
(2)特性
諸試験を実施した結果を表6に記載した。表6に示す如く、比較例4は諸試験において良好な結果は示さなかった。実施例5及び6は、諸試験の総てにおいて明らかに良好な結果を示し、ヒト皮膚での諸試験において良好な結果を示し、ヒト皮膚での諸試験において皮膚刺激は生じなかった。
【0036】
【発明の効果】
以上記載の如く、本発明のキサントトキソールを含有する皮膚化粧料は、紫外線による皮膚の炎症抑制効果に優れ、メラニン色素の産生抑制効果、皮膚の色素沈着の速やかな淡色化効果及び皮膚刺激が無い等、使用感に優れた皮膚化粧料として有用である。
【図面の簡単な説明】
【図1】本発明で示したキサントトキソールの13C−NMRスペクトルを示す図である。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a skin cosmetic having an effect of suppressing skin inflammation caused by ultraviolet rays and an effect of rapidly lightening dark skin.
[0002]
[Prior art]
When ultraviolet rays are exposed to the skin, the skin is affected in various ways. At that time, active oxygen, lipid peroxide, and the like generated in the skin cause inflammation and cause great damage to the skin tissue. These damages cause loss of moisture, texture, texture, etc. of the skin, and further affect the dermis, forming wrinkles and the like and causing light aging. In addition, as one of the causes of skin color change and darkening, active oxygen generated by ultraviolet rays and various factors released from surrounding cells activate melanocytes and increase tyrosinase activity, resulting in excessive production of melanin. It is thought to be delivered to epidermal cells. Melanin is produced by oxidation of tyrosine, and as a result, the skin tone is changed and blackened.
[0003]
Therefore, in order to show a whitening effect, it is important to suppress melanin production and to suppress an inflammatory reaction caused by active oxygen, lipid peroxide, and the like caused by exposure to ultraviolet rays. It is considered to play an important role in maintaining the normal state and preventing photoaging.
[0004]
Conventionally, whitening cosmetics containing kojic acid, arbutin, hydroquinone monobenzyl ether, hydrogen peroxide and the like have been proposed in order to prevent darkening, blotches and freckles in the skin and to keep the original white skin. Moreover, vitamin C etc. are proposed in order to suppress the inflammation by ultraviolet rays.
[0005]
[Problems to be solved by the invention]
When arbutin, kojic acid, hydroquinone monobenzyl ether, etc. are blended, there is an effect of slightly fading the skin of dark black, but it does not reach the desired level. Moreover, there is no inflammation suppression effect by ultraviolet rays, and there may be a problem on the safety of the skin. Vitamin C and the like have a whitening effect and an anti-inflammatory effect, but there is room for improvement in terms of the degree and stability of the effect. Thus, it is extremely difficult to obtain a skin cosmetic that is excellent in inflammation suppressing effect and whitening effect, has high skin safety, and has sufficient storage stability.
[0006]
Under such circumstances, the object of the present invention is to provide a skin cosmetic that is excellent in inflammation suppression effect and whitening effect, has high stability in the preparation, high skin safety, and excellent usability.
[0007]
[Means for Solving the Problems]
In light of such circumstances, the present inventors have conducted extensive research to improve the problems of the prior art, and as a result, the specific compound used in the present invention has a remarkably superior inflammation suppressing effect and whitening effect. It has been found that it has a high stability and skin safety, and can provide a skin cosmetic with an excellent feeling of use.
[0008]
In order to achieve the above object, the skin cosmetic of the present invention has the following configuration. That is, the present invention is a skin cosmetic characterized by containing xanthotoxol (8-hydroxypsoralen) represented by the following structural formula (1).
[0009]
[Chemical 1]
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail.
[0011]
Xanthotoxol can be obtained by acid degradation of xanthotoxin or imperatorin according to a conventional method. It can also be obtained by direct extraction from natural products such as Angelica seeds.
[0012]
The blending amount of xanthotoxol in the skin cosmetic is preferably 0.01 to 5.0% by mass (hereinafter referred to as wt%), more preferably 0.05 to 5%, based on the total amount of the cosmetic. 3.0 wt%.
[0013]
If the blending amount is less than 0.01 wt%, the intended effect of the present invention may not be sufficiently obtained, and even if the blending amount exceeds 5.0 wt%, improvement in the effect commensurate with the increase cannot be expected. In some cases, the feel during use tends to be poor, and it is difficult to maintain individual dosage forms.
[0014]
The skin cosmetic of the present invention may be used as a bath agent in addition to a cosmetic generally applied to the skin. As the dosage form, it is possible to use a commonly used aqueous solution, W / O type or O / W type emulsion, appropriate excipients, etc. to form granules or other powders, tablets, etc., specifically Examples include creams, emulsions, lotions, packs, gels, sticks, sheets, and pops. For example, in the case of a milky lotion, this skin cosmetic can be produced by an ordinary method in which an oil phase and an aqueous phase are heated and dissolved, emulsified and dispersed, and then cooled.
[0015]
In addition to the above, the skin cosmetics of the present invention include tar dyes, colored pigments such as iron oxide, antiseptics such as parabens, anionic surfactants such as fatty acid soaps, sodium cetyl sulfate, and polyoxyethylene. Nonionic surfactants such as alkyl ethers, polyoxyethylene fatty acid esters, polyoxyethylene polyhydric alcohol fatty acid esters, polyoxyethylene hydrogenated castor oil, polyhydric alcohol fatty acid esters, polyglycerin fatty acid esters, tetraalkylammonium salts, etc. Cationic surfactants, betaine type, sulfobetaine type, sulfoamino acid type, amphoteric surfactants such as sodium N-stearoyl-L-glutamate, natural surfactants such as lecithin, lysophosphatidylcholine, Gelatin, casein, starch, gum arabic, cara Natural polymers such as gum, guar gum, locust bean gum, dragagacanto gum, quince seed, pectin, carrageenan, sodium alginate, semi-synthetic polymers such as methyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, sodium carboxymethyl cellulose, ethyl cellulose, polyvinyl alcohol, polyvinyl Synthetic polymers such as methyl ether and copolymer, polyvinylpyrrolidone, sodium polyacrylate, carboxyvinyl polymer, polyethylene oxide polymer, thickeners such as xanthene gum, pigments such as titanium oxide, antioxidants such as dibutylhydroxytoluene, etc. Can be appropriately blended within a range not impairing the object of the present invention.
[0016]
【Example】
Hereinafter, the present invention will be described in detail based on examples, production examples, and comparative examples. In addition, this invention is not limited to these.
[0017]
Xanthotoxol used in the present invention was obtained as pale yellow flocculent crystals by heat treatment of xanthotoxin in an aluminum chloride-hydrochloric acid system and recrystallization from a hexane-ethyl acetate (1: 1) mixed solvent. The structure of the obtained xanthotoxol was confirmed by GC-MS and NMR (FIG. 1).
[0018]
The following melanin production inhibition test was performed using the obtained xanthotoxol.
[0019]
(1) Melanin production inhibition test
B16 melanoma cells were seeded on a 24-well plate at 3 × 10 4 cells / well, and after 24 hours, the medium was replaced with a medium containing Theophylline containing each sample compound.
After culturing for 72 hours to determine the number of cells, the cells were subsequently treated with 10% TCA, ethanol / diethyl ether (= 1/1). Subsequently, the OD475 value after dissolution in a 1 mol / L sodium hydroxide aqueous solution containing 10% dimethyl sulfoxide was determined to obtain the amount of melanin, and the inhibition rate (%) of melanin production per cell was determined. Table 1 shows the test results.
[0020]
[0021]
Various tests conducted on the skin cosmetics of Examples and Comparative Examples described later; (2) Ultraviolet erythema suppression test (3) Whitening practical test (4) Continuous sensory test test methods are as follows.
[0022]
(2) Ultraviolet erythema suppression test The dorsal skin of 10 Hartley guinea pigs that had undergone depilation was irradiated with 2 times the minimum amount of erythema in the UVB region. Set the sample application site and base (excluding the sample) application site, apply the sample or base 24 hours before and immediately after irradiation, and determine the erythema state according to the criteria shown in Table 2 after 24 hours. The evaluation was based on the average score.
[0023]
[0024]
(3) Whitening practical test For the left forearm bent side skin of 20 test subjects exposed to sun light in summer for 3 hours (1.5 hours per day for 2 days) A sample was applied from the day exposed to sunlight, and the base was applied to the right forearm flexor skin from the day exposed to sunlight once a morning and evening for 13 weeks. In addition, evaluation was shown by the number of the test subjects by whom the whitening effect was confirmed in the sample application part from the base application part.
[0025]
(4) Continuous sensory test When 20 female test subjects were applied for 13 consecutive weeks once a day in the morning and evening, the characteristics of the sample were evaluated, and “the skin became moistened” and “the skin became brighter” "The number of people who answered."
[0026]
Examples 3-4, Comparative Example 3 (skin lotion)
In the raw material composition of Table 3, the active ingredients listed in Table 4 were blended to prepare skin lotion, and the above tests were carried out.
[0027]
Preparation Method After the B component described in Table 4 was uniformly dissolved in the C component, the A component and the C component were mixed and stirred and dispersed uniformly, and then filled into a container.
[0028]
[0029]
[0030]
-The results of the characteristic tests are shown in Table 4. As shown in Table 4, Comparative Example 3 did not show good results in various tests. The skin cosmetics of the invention of Examples 3 and 4 showed clearly good results in all tests and no skin irritation occurred in tests on human skin.
[0031]
Examples 5-6, Comparative Example 4 (skin cream)
In the raw material composition of Table 5, active ingredients were blended as shown in Table 6, skin creams were prepared, and the above tests were performed.
[0032]
Preparation Method A component described in Table 5 and a mixture of B component and C component are heated and dissolved uniformly to bring the temperature to 80 ° C. Next, the component C was injected into the component A and emulsified, and then cooled to 30 ° C. with stirring.
[0033]
[0034]
[0035]
(2) The results of various characteristic tests are shown in Table 6. As shown in Table 6, Comparative Example 4 did not show good results in various tests. Examples 5 and 6 showed clearly good results in all tests, showed good results in tests on human skin, and no skin irritation occurred in tests on human skin.
[0036]
【The invention's effect】
As described above, the skin cosmetic containing xanthotoxol of the present invention has an excellent skin inflammation-inhibiting effect due to ultraviolet rays, has a melanin pigment production-inhibiting effect, a rapid lightening effect of skin pigmentation, and skin irritation. It is useful as a skin cosmetic with an excellent feeling of use.
[Brief description of the drawings]
FIG. 1 is a diagram showing a 13 C-NMR spectrum of xanthotoxol shown in the present invention.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31645099A JP4638567B2 (en) | 1999-11-08 | 1999-11-08 | Skin cosmetics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31645099A JP4638567B2 (en) | 1999-11-08 | 1999-11-08 | Skin cosmetics |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001131050A JP2001131050A (en) | 2001-05-15 |
| JP4638567B2 true JP4638567B2 (en) | 2011-02-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31645099A Expired - Fee Related JP4638567B2 (en) | 1999-11-08 | 1999-11-08 | Skin cosmetics |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100769578B1 (en) * | 2003-10-17 | 2007-10-23 | 주식회사 엘지생활건강 | Cosmetic composition for improving skin wrinkles |
| KR100769579B1 (en) * | 2003-11-18 | 2007-10-23 | 주식회사 엘지생활건강 | Cosmetic composition for improving skin wrinkles |
| CN100542527C (en) * | 2003-10-17 | 2009-09-23 | 株式会社Lg生活健康 | Composition for promoting collagen synthesis and skin external preparation composition containing the same |
| KR100769577B1 (en) * | 2003-10-17 | 2007-10-23 | 주식회사 엘지생활건강 | Cosmetic composition for improving skin wrinkles |
-
1999
- 1999-11-08 JP JP31645099A patent/JP4638567B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2001131050A (en) | 2001-05-15 |
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